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Hemlock Woolly Aldelgid

The hemlock woolly
adelgid, Adelges tsugae, has been in the United States since
1924.

This introduced insect, believed to be a native of Asia, is
a serious pest of eastern hemlock and Carolina hemlock. In the
eastern United States, it is present from the Smoky Mountains,
north to the mid-Hudson River Valley and southern New England.